THE DICOM 2013 INTERNATIONALCONFERENCE & SEMINARMarch 14-16 Bangalore, India
Optimizing Export Image Quality
Shreelaxmi BhatPhilips Healthcare Technical Specialist Bangalore, India
Co-Authors: Easwara MoorthyPhilips HealthcareBangalore, India
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Optimizing Export Image Quality
Image Quality What is Grayscale Standard Display Function? Display Systems Solution - Export IQ Optimization Proposal - Workflow Enhancement How Export fits into the architecture An Analogy and Examples A substitute “Standard Display” Benefits, Conclusion References Contact info of Presenter
Consistent IQ across review stationsImproves the diagnostic
Confidence
Potential to Provide better Patient Care
Image Quality
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What is Grayscale Standard Display Function?
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When exporting with GSDF; The image is exported with the promise that it will be displayed on a Standard Display
The GSDF Standard Display
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The final image processing steps take place in the Standard Display
What if there is no Standard Display Available?
GSDF- Some Assembly required
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Would you use your new table without unpacking it?It would work?
Displays Systems
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Display Systems can be categorized into Standard Displays (GSDF-Calibrated) and General Displays (Non-GSDF-Calibrated)
It is very rare that the display systems are Standard Displays. Especially in the value segment market, most of the review station monitors are General Displays.
Customers demand for an alternative solution from vendors.
“Export Image Quality Optimization” provides :-
Customized LUT for a wide range of brightness luminance to support the Generic Displays.
A wizard to guide the selection of appropriate LUT for the destination.
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Solution - Export IQ Optimization
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Proposal - Workflow Enhancement• GSDF Calibrated review station.
Set to use GSDF compensation.
Start
Exit
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Proposal - Workflow Enhancement
Non GSDF Calibrated review station
Regenerate for each LUT luminance
Create a new study + Add regenerated images.
Export the study to Review station.
Set the export compensation.
Review station.
Look for the best viewed image
Exit
Start
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Pictorial Representation
How Export fits into the architecture:
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Exported Images
Presentation(Export)Unity or Selected
LUT
Presentation(Display)
Unity
Standardized Display System
Polarity(Unity)
Valuesof
Interest
UltrasoundAcquisition and Image Formation
DICOM Image Presentation
Export GSDF/LUT
Selection
An Analogy
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Viewing a Raw GSDF image is like a car with just the primer coat
Same car viewed with a “Standard Display” or an appropriate export LUT is like applying the final coat of paint
Example Images
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Raw GSDF images are too contrasty, over gained, and appear grainy
With the appropriate LUT the image is smoother and appears like it did on the system
A substitute “Standard Display”
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Export LUT + a Generic Display approximates a “Standard Display”
Provided by a User selected Export LUT + Generic Display
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Benefits
Export LUT + a Generic Display approximates a “Standard Display”
Supports GSDF for a Standard Display.
It is a one time task usually done by a doctor with the help of a Field Service Engineer (FSE). Future exports will use the selected settings.
There need to be an alternative setting available to facilitate this LUT selection at any point of time.
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Conclusion
Even though the DICOM GSDF continues to address the issues related to differences in display characteristics, there are situations where a different solution may be needed.
The proposed solution enhances the DICOM GSDF by addition of a wide range of LUTs.
This helps in optimizing the exported image quality and hence provides the potential for better patient care.
References
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http://dicom.nema.org/
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Author Contacts
Shreelaxmi Bhat• [email protected]• Philips Innovation Campus
Manyata Tech Park, Nagavara, Bangalore - 560045 India
Easwara Moorthy• [email protected]• Philips Innovation Campus
Manyata Tech Park, Nagavara, Bangalore - 560045 India
Thank you for your attention !
